Calculating machine



Feb. 27, 1940. R. HOFGAARD l 2,191,567

- CALCULATING -lvmcHnm Filed Jan. 4, 1937' 8 Sheets-Sheet l E1- E l.

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Feb. 27, 1940. R. HOFGAARDv 2,191,567

CALCULATING MACHINE I Filed Jan. 4, 19:57 s sheets-sheet 2 m mi Feb. 27, 1940. R. HOFGAARD CALCULATING MACHINE Filed Jan. 4, 1937 8 Sheets-Sheet I5 Feb. 27, 1940.

R. HoFGAAmmv 2,191,567 CALCULATING MACHINE Filed Jan. 4, 1937 8 Sheets-Sheet 4 Feb. 27, 1940. R. HoFGAARD 2,191,567

CALCULATING MACHINE Filed dan. 4, 1957 s sheets-sheet 5 18H Hagi ,5,11

af fa? /03 Feb. 27, 1940. R, HOFGAARD 2,191,567

CALCULATING MACHINE Filed Jan. 4, 1937 8 Sheets-Sheet 6 Feb. 27, 1940.

R. HOFGAARD CALCULATING MACHINE Filed Jan. 4, 1937 8 Sheets-Sheet '7 Feb. 27, 1940. R. HOFGAARD 2,191,567

I GALCULATING MACHINE l l Filed Jan. 4, 1937 8 Sheets-Sheet 8 Patented Feb. 27, 1940 cALoULA'rING MACHINE aou Hmm-dg mate Gard, stromen, Norway Application January 4, 1937,SeriaLNo. 119,027 In Sweden January 4, 1936 11 Claims.

The present invention refers to vcalculating machines operating with electric circuits in con- Junction with registering or accumulating members and relays controlling contacts for closing said circuits. Prior machines of this general type operate with digit lines comprising lead groups of ten digit leads or, in other prior machlnes, the group of leads corresponding to the digit lines of the decimal system occur-in a number smaller than 10. I'hese groups of leads, by

means of which one-figure numbers of the decimal system are expressed in code form, are connected to registering members for each denominational order. The said registering members have the common feature that a transfer from a lower order to the next higher order takes place when the valueregistered in the lower order exceeds the capacity of the registering member for the lower order, such as for instance the number 9 in the units order.

The present invention makes use of registering or accumulating members for the registering of a plurality of the basic values of a numerical system. Since each registering member thus accumulates individual basic values, the method of effecting a transfer from one basic value to the next higher value is simplified in that such transfer is delayed until the final result of a calculation operation is wanted. That part of a value registered by the accumulating member of one denominational order, which belongs to one or more higher denominational orders will be determining for the correct result circuits without any prior registering of the said values u by the accumulating members corresponding to the respective denominational values involved. According to another characteristic feature of the machine according to the present invention, all valuesl are registered according to the riumerical system having the. number 2" as the basis in a geometric series. As this system is built up solely of basic valueskthe mechanicall registering of these values, i. e., the operation of the accumulating members, will be effected in 4l different members. The result which is expressed by ordinary numeral characters vneed not necessarily appear in figures of the decimal system, since in addition to the latter both the system having thenumber 2" as its basis or for instance, also systems having the number "l2" or the numberf as a basis may be used.'

In connection with the present form of embodiment, however, the result will appear in figures of the decimal system, although it is also the same manner for all values, although by (Cl. 23S-61) illustrated as being transferred to a system using the code 1-2-4-8 and so on. It may also be carried out according to other mathematical systems, such as for instance according to systems having the numbers 12 or 20" as basis, 5 in which systems, however, the various values are expressed by figures belonging to the conventional decimal system.

The advantages obtained by the machine according to the present invention are, in the rst lo place, great simplicity as regards its mechanical details and, secondly, high speed, inasmuch as the various calculations are carried out with the same mechanical operations regardless of the value of the ilgure concerned, and therefore u simultaneous functioning oi' the operating member is rendered possible, especially as the operating members chiefly consist of electric relays which aci; almost instantaneously.

The invention relates to a calculating ma-,20 chine of that special type which operates with the aid of impulses of an electrical or mechanical character. or both. These calculating machines substantially have no rotating, oscillating or reciprocating calculating mechanisms, such as the 25 conventional mechanical calculating machines have. They are primarily based on results which are determined or calculated beforehand, and are thus established by electric circuits, and each result concerned in a calculating operation is to be found by closing the proper circuit or circuits by the ald of electrical means, such as selectors or relays. Similar calculating machines are previously known, in which, however, a second number of a calculating operation can be introduced into the machine only/ through the agency of the' first number already introduced into the machine.

Now, the calculating machine according to the present invention is principally distinguished by 40 the feature that it operates directly with a code, without any previous transfer of the code to the decimal system.

As is well known, four basic impulses are sufficient to express the digit numbers of the decimal system since they provide fifteen combinations, in which the four impulses each appear only once. These four basic impulses may preferably represent the numbers 1, 2, 4 and 8, the other numbers being derived from these by computation. 'I'he calculating machine according to the present invention is based on the reception of four basic impulses in various combinations to register thenumbers 1 9, also the transmission obtained in the same code form of the re- In accordance with the statements hereinbefore, the calculating machine according to the present invention thus is provided with adjustable members, such as accumulating members or selectors, directly accumulating the desired result of the calculating operations, said accumulating members occurring in a number corresponding to the least or approximately to the least possible number of digits for compounding all digits of the basic order of a digit system, such as the rst nine digits of the decimal system. When here the least or approximately the least number is spoken of, this implies that the present invention is primarily based on the possibility of reducing the number of operating members to the least possible figure, for instance to only four adjustable members in the decimal system, such members representing the four numbers l, 2,4, 8 for each denominational order. On the other hand, the invention also comprises such modications, where approximately the least possible number of adjustable members are brought into use. For example, an approximately least possible number of members may include, in addition to the four members representing l, 2, 4, 8, a further member representing the number 6 which corresponds to 'I'he expression the least possible number of digits required for compounding all digits of the basis order oi a digit system thus implies that, for instance in the decimal system (that is to say, a system having orders of units, tens, hundreds, etc), the nine digits 1-9-in each order may be compounded with the aid of the above mentioned four members l. 2, 4 and 8 only, which are used singly or are compounded in the following mannerz- 1, 2, 1+2=3, 4, 4+1=5, 4+2=6, 4+2+1=7, 8, 8+1=9. In all such compounding, each one of the four basic numbers always occurs but once. The possibility is conceivable, however, that for instance for the digit 8 two impulses could be used, each representing the dig- The adjustable or accumulating members pertaining to` the calculating machine, which, for the sake of simplicity, in the following are termed selectors, inasmuch as this'kind of mechanism is the most suitable for this purpose, are preferably Amay be initiated by means known from other technical elds, such as for instance keys, perforated cards, levers and so forth.

'I'hree different forms of embodiment of the invention are illustrated in the accompanying drawings, wherein:

Fig. 1 is a fragmentary side elevation, with parts in section of a contact operating relay;

Fig. 2 is an elevation of a stepwise operating selector;

Fig. 3 is a transverse section thereof on line 8 3 of Fig. 2;

Fig. 4 is a circuit diagram of that part of the apparatus which includes the selectors for recording the numbers l, 2, 4, 8;

Fig. 5 is a circuit diagram of that part of the vapparatus which includes the selectors for recording the numbers 10, 20, 40 and 80;

Fig. 6 is a circuit diagram of the relays that are employed for multiplication operations;

Fig. 7 is a circuit diagram of the transmitting members and transfer members for addition,-

Fig. 10 shows the same printing device in plan View with the connections or the magnets representing the digits 0-9 in two denominationalorders;

Fig. 11 shows a modied circuit diagram of apparatus employing a numerical system with the number "12. as basis; and

Fig/ 12 shows a further modified circuit diagram of vapparatus employing a numerical system with the number "20 as basis.

Referring to the drawings, the whole machine may be said to consist of the arrangements shown in the four diagrams, Figs.` 4, 5, 6 and '7. These diagrams should be joined together in the manner shown in Fig. 8. The latter figure also shows that the machine may be extended, if a greater capacityis desired, by adding. further units to Figs. 5 and 6, respectively, In these various diagrams, substantially three kinds of operating mechanisms are utilized. These are the following: f

(A) Relays or magnets having armatures which operate contacts of the usual kind, that is to say making contacts, breaking contacts and change over contacts. Suche. relay arrangement is shown in Fig. 1.

(B) Accumulators or selectors adapted to have various positions in relation to an initial position, each accumulator representing a certain `numerical value and the various positions representing multiples of such numerical values. A preferable form of such selector is shown in detail in Figs. 2 and 3.

(C) Electric leads including contacts, which are operated either by the relays mentioned under (A)` or by the selectors mentioned under (B) and further including manually operable control buttons such-as i6-|08, Fig. 7, or switches.

The relays, which'operate in the manner indicated in Fig. 1 and explained below, are the following in the four diagrams mentioned above: i-Y on the left-hand side of Fig. 4; |2-I5 and lG-ZU on the right-hand side of Fig. 4; 2I28 on the left-hand side of Fig. 5; 33-36 on the righthand side of Fig. 5; 31-44 in Fig. 6, 45-5! at the top of Fig. 7; 52-59 in the lower left-hand corner of Fig. 7; 66 in the upper left-hand corner of Fig. 7; 6I' and 62 in the middle of Fig. 7 to the left, and 63-66l in the lower right-hand corner of Fig. 7;- 268 and 269 at the right-hand side of Fig. 10; 326, 339 and 346 on the left-hand side of Fig. 11 and 316 at the bottomt of Fig. 11: finally, 423-421 at the bottom of Fig. 12; 43B at the upper left-hand corner of Fig. 12, and I in the middle of Fig. 12.

The accumulating devices, which in the following are called selectors, are shown in Fig. 2, where they have been denominated i. and these selectors which have the form of rollers are rotated stepwise by means of a. mechanism which in turn is operated by the selector actuating magnet or relay h. The details of this mechanism are shown in Figs. 2 and 3. In the diagrams, the selectors and the pertaining driving magnets are the following: in Fig. 4, selector 61,

driving magnet 8; selector 68, driving magnet 9;

selector 69, driving magnet |0`; selector v10, driving magnet il; in Fig. 5, selector 1|; driving magnet 29; selector 12, driving magnet 30; selector 13, driving magnet 3|; selector 14, driving magnet 32; in Fig. 11, selector 3|1. driving magnet 32|; selector 3i8, driving magnet 322; selector 3|9, driving magnet 323; selector 320, driving magnet 324; in Fig. 12, selector 390, driving magnet 394; selector 39|, driving magnet 395; selector 392, drivingmagnet 396; selector 393, driving magnet 391.

, The relays, magnets and selectors are interconnected by circuits, and the source of current is derived from a battery Ba, shown in the upper left-hand corner of Fig. 4, in the middle of the lower part of Fig. 11 and at approximately the same place in Fig. 12. These circuits are closed by switches or by pressing down buttons or keys and opened by releasing said buttons or by opening said switches. The operating buttons or keys in Fig. 7 are the followingz, 16-84 corresponding to the digit numbers 1-9, both inclusive; the buttons 85-93 corresponding to the numbers 10- 90, both inclusive; the buttons 94-I02 corresponding to one-ligure multipliers 1-9, both inclusives The button 01 is utilized when figures are added.'v

the button |06 is utilized when one figure is subtracted;l from another figure, and the button |09 is utilized when the selectors are to be returned to their initial position upon a calculating operation having been carried out. The button |03 is utilized when it is desired to obtain the result in code form, for instance, for transmitting the same to perforated cards or the like.

The button |04 is utilized when the result is to be expressed in the decimal system by means of the device shown in Figs. 9 and 10. The buttons or keys 94| 02 may be extended by further rows of similar buttons to express two-digits or more-digits multipliers. Such further rows of buttons have not been shown, however, as they are identical with those illustrated. It is of course to be understood that such additional buttons will cooperate with relays of the same kind as the relays 4|-'44. Fig. 6. No special button or key is required for initiating a multiplication operation. By setting up the multiplier by means of any of the buttons 94-I02 the buttons 16-99 are automatically prepared for setting up the multiplicand or multiplicands thereon.

There are further switches s hown in the leads |11, |84, |92 near the relays 55, 52 andi 56 in the left-hand corner of Fig. 7 and in the lead near the button |09. 'I'hese switches are generally opened and may be mechanically connected with the button |06, so that they are closed when pressing down button |06. There is further a changeover switch at the upper left-hand corner of Fig. 7, the function of which will be explained later on.

In Fig. 1l. the buttons 353-393 correspond to the digits l-ll in the duodecimal system, and the button 352 is utilized for closing the circuit including the lead 35|. In Fig. 12, which in the general outlay is similar to the diagram shown in Fig. l1, the buttons 398-406 represent the ngures 1-9 in the numerical system having the number as basis. The buttons 401 and 439 are utilized for closing circuits and will he described later on.

In Figs. 11 and 12 there are shown signalling lamps 364-315, .382-385, 428-431 and 44i-443. These signalling lamps maybe utilized; for indicating visibly the result obtained by the calculating operation.

Further, electric magnets are used in the mechanism shown in Figs. 9 and 10, wherethey serve as stop members for the indicating bars 302 and 303.

Further details will come forth in the following description.

A typical relay unit, as shown in Fig. 1, includes a magnet a having a spring-retracted armature b for actuating a plate c of insulating material that is notched to receive the movable ends of a series of contact springs e and e' which are secured), at their other ends, in the insulating plate d. Energization of the magnet and the resultant attraction of the armature moves the plate c in such manner that the springs c and e introduced into the plate c leave their back or resting contacts f so as to be pressed against their working contacts g. The plate c as well as the carrying plate d are shown as broken away since a varying number of springs are employed in the different relays.

' Selectors Fig. 2 shows a step selector viewed from above. The magnet h. which is termed'r the selector actuating relay in the following, moves, for each circuit closure over the coil thereof, th'e roller i by one step forward with the aid vof the pawl i which is pivoted to the armature k. The spring l causes the pawl to engage the ratchet wheel m. 'I'he spring n causes stepwise feeding of the roller when the circuit over the coil for the magnet h is opened, whereby the spring n retracts the armature. m is transmitted to the roller by the gear wheels o and p. The roller i carries projectionsq, by means of which the contact rods r inserted into the bearing sleeves s and pressed against the roller by the coil springs t are moved. The contact rods of insulating material are provided with notches for the contact springs u which cooperate with the fixed contact bars v. Movement of each rod r by the roller displaces the associated Contact springs u towards the left, Figs. 2 and 3. and thereby alters the ncontact condition at each spring. The set of springsfwhich is shown in Fig. 3 includes three contact springs u displaced into contacting position with their respective contact bars v and( a fourth resting or back contact displaced into open position. This group \of springs will hereinafter be termed the first set of contacts of the roller. The contact springs corresponding to the following four bars are designated the second, third. fourth and fth set of contacts respectively. The number of contacts and the mode of closing them may be varied arbitrarily. The springs as well as the contact bars v will also be counted in numerical order from the roller.

In connection with the armature k, the arm w has secured thereon an insulating button adapted to actuate the two spring sets 3:, y. Whcn the armature is attracted, the contact is opened bctween the springs .'c, while the set of contacts y are closed.

The movement of the ratchet Wheel ,.45

All relays are represented as rectangles, and the conductor or conductors by which the coil is Wound are represented as spirals about the relays. The various sets of contact springs actuated at a movement of the armature of the coil are shown as being parallel to one -of the sides of the rectangles, Where the contact points proper will be seen. To make the figures of the drawings more clear, the armature proper and the mechanical transmission means for the transmission of the movement thereof to the springs, as described with reference to Fig. 1, are not illustrated. All relay contacts are shown in the position which they assume when the circuit or circuits extending over the coil are not closed with the two terminals of the battery. The contact points of the movable springs then rest on their resting contacts, provided such are included, which resting contacts, as far as the relays |-36 and the relays 263 and 269, Fig. 10 are concerned, bear on the contact point of the movable contact springs on the right hand side of the spring, whereas in the relays .tl-6 they bear on their respective resting contacts at the contact point on the left hand side of the spring. The movement of the springs is toward the working contacts, which, if vthere is any, are arranged on the set of springs on the opposite rside of the spring relatively to the resting contact. Ii there is no resting contact, a circuit will consequently be closed over the movable contact spring, When a circuit over the coil corresponding to the spring is closed. Figs. 4, 5, 11 and l2 show a series of step selectors of the type shown in Figs. 2 and 3 by Way of diagrammatic representation, the

mechanical transmission means to transmit the movement of the amature to the various sets of contacts being here also omitted to render the diagram more surveyable. The contact points of the springs are shown relatively to the roller which is represented as a rectangle. Thus, the frames 675m in Fig. 4, the frames 'Hl-'M in Fig. 5, the frames Sil-32B in Fig. 1l and the frames 3396-393 in Fig. 12, designate the roller i such as shown in Fig. 2. The sets of contacts illustrated in the same ligure' are represented diagrammatically in Figs. 4, 5, 11 and 12 relatively to the frames. All contacts are shown in inoperative position, which is the case also with those that are moved with the aid of the lrst contact rod r (the uppermost rod r in Fig. 2) which is shown in Fig. 2 in operative position. The relays corresponding to the magnet h and provided for the movement .of the rollers S'lare represented in the form of rectangles -li corresponding to the frames G'i-l and as rectangles 29-32 cor- `.responding to the frames ld-Td. In the sets of contacts operated by the rollers 6T and 1|, some sets of contacts are shown where two contact springs are adapted simultaneously to make contact with the contact bar corresponding to the set of contacts. The contact bars 'v pertaining to the roller occur in different numbers for the various rollers. Thus there is. one contact bar v for the contacts pertaining to the roller 61. To

the step selector 68 belong three contact bars o, while the step selector 69 and the step selector 'l0 have five contact bars o each. The step selector 1|, Fig. 5, has seven contact bars, While each of the step selectors l2, 13 and 'F4 is provided with five bars o. Y

In the calculating machine in consideration, the step selectors are used as accumulating members. Each particular connection of the contact points and the bars of the selectors represents by a simple manipulation, whenever this may be desired. The bar o pert to the selector 67 is connected directly to the plus terminal of the battery Ba, Fig. 4. Of the contacts cooperating with this bar, the contacts in the 1st and 2nd sets of contacts counted from the lett in Fig. d are connected with each other and with the lead |05 which is connected to the rst bar (that is to say the bar nearest to the roller) of the step selector S8. The contacts inthe 3rd and ath sets of contacts of the selector El are connected with each other and with the second bar of the selector @t by means of the lead iid. Finally, the contact in the 5th set of contacts is ccnnected to the third bar of the selector t@ by means of the lead il t. lThe 1st contact in the 1st set of contacts of the selector @t is connected with the iirst bar of the selector @9 through the lead H2. The ist contact of the 2nd set of contacts is connected to the 2nd contact of the lst set of contacts and through the lead H3 with the second contact bar of the selector 69. The 1st contact of the 3rd set of contacts is connected with the 2nd contact of the 2nd set of contacts and with the 3rd contact of the 1st set of contacts and by means of the lead Hd with the third contact bar of the selector 69. The lst contact of the 4th set of contacts is connected to the.2nd contact of the 3rd set of contacts and with the 3rd contact in the 2nd set of contacts and through the lead H5 to the fourth bar of the selector 63. The lst contact of the 5th set of contacts is connected to the 2nd contact of the 4th set of contacts andthe 3rd contact of the 3rd set of contacts and through the lead HS with the fth contact bar of the selector 69. The vsecond contact of the 5th set and the 3rd contact of the 4th set are connected with each other and with the lead H2 over a coil of the relay l. The 3rd,contact of the 5th set is connected with the lead H3 over a second coil of the relay i. In the selector 69, the 1st, 2nd, 3rd, 4th and 5th contacts of the 1st left hand set of contacts are connected through the leads ||1|2| to the rst, second, third, fourth and ifth contact bars, respectively, of the selector 73. Of the 2nd set of contacts for the selector Vl69 the 1st and the 2nd contacts are also connected to the leads H9 and t28 respectively. Likewise, the 1st contact of the 3rd set of contacts as well as the 3rd contact of the 2nd set of contacts are connected to the lead |2l. 'I'he leads |22|26 extend, respectively, from the 2nd contact of the 3rd set of contacts connected to the 4th contact of the 2nd set of contacts, from the 1st contact of the 4th set of contacts connected to the 3rd contact of the 3rd set of contacts and to the 5th contact of the 2nd set of contacts, from the 2nd contact of the 4th 'set of contacts connected to the 4th contact of the 3rd set of contacts, from the 1st contact of the 5thset` of contacts connected to the 3rd contact of the 4th set of contacts and to the 5th contact of the 3rd set of contacts, and from the 2ndcontact of the 5th set of contacts connected to the 4th contact of the 4th set of contacts. These leads |22|26 are each connected over a coil of the relay 2 tothe leads lll-IM. The lead |21 from the 3rd contact of the 5th set of contacts connected to the 5th contact of the4th set of contacts extends, together with the leads |28` and |29 from the animar'` th and 5th contacts of the 5th set of contacts for the selector 33 over a coil of the relay 3 to the leads ||1, ||3 and ||3, which are connected,

together with the leads |23 and |2|, as stated. each to a contact bar of the selector 15.

The contact points of the selector 1|| are connected to the leads |3|i|34 in a manner such that the contacts of the 1st set of contacts and the 1st contact of the 2nd set of contacts which the 3rd set of contacts, the 1st contact of the 4th set of contacts, in connection with said 5th contact of the 3rd set, and the 2nd and 3rd contacts of the 4th set of contacts are also connected in the same order to the leads |30|34 over coils of the relay 4. 'I'he 4th and the 5th contacts of the 4th set of contacts, the 1st contact of the 5th set of contacts. which is connected to said 5th contact of the 4th set, and the 2nd, 3rd and 4th contacts ofthe 5th set of contacts are connected in the same order with the leads |33| 34 over coils of the relay 5. The 5th contact of the 5th s et of contacts is connected to the lead |3|| over the coil of the relay 1. The set of leads |30|34 are extended, together with the lead |35 which is connected to additional springs of the 2nd and 4th sets of contacts for the selector 51, out of Fig. 4 as result leads corresponding to a registered value determined by the mutual position of the rollers 51-10. The leads are connected to a printing device as shown in Figs 9 and 10, which will be described hereinafter. To render the Figures 4-'1 which represent circuit diagrams of parts of .the complete system readily understandable in their relation to each other, said figures are arranged in such a manner that the connecting leads may be followed by placingethe figures relatively to each other as shown in Fig 8. Thus the said leads |30|34 are extended over Fig. 5 to contacts of the relays 53 and 54, Fig. '1: Since the circuits that must be closed over these leads are determined by the position of the rollers, the latter will cause a circuit to be closed from the plus terminal of the battery over the respective working or resting contacts of the relays |1, in a manner such as will appear from Fig. 4, to one of the leads |35|42. These leads which are extended from Fig. 4 will again be found in Fig. 5, where they appear as being connected to the bars of the selector 1|', from-the 1st to the '1th contact bars, respectively. The leads |43|41, which are connected with the contact bars of the selector 12, are directly connected -with the following contact points of the selector. 1|. Lead |43 is connected to the 1st and the 2nd contacts of the 1st set of contacts and to the ist contact of the 2nd set of contacts. Lead |44 is connected to the 3rd and the 4th contacts of the 1st set of contacts, the 2nd and the 3rd contacts of the 2nd set of contacts, the lst and 2nd contacts of the 3rd set of contacts, and to the ist contact of the 4th set of contacts. Lead |45 is connected to the 5th and 6th an'd to the 4th and 5th and to the 3rd and 4th and to the 2nd and 3rd and to the 1st and 2nd contacts of the 1st to 5th contact sets respectively. Lead |43 is connected to the '1th contact of the 1st and 2nd sets, the

6th contact of the 2nd and 3rd sets, the 5th contact of the 3rd and 4th sets, the 4th contact of the 4th and 5th sets and 3rd contact of the 5th set. Lead |41 is connected to the '1th contact of the 3rd and 4th sets, the 6th contact ofthe 4th and 5th sets and the 5th contact of the 5th set. VLead |43 connected to the 7th contact of the 5th set is extended over the coil 22 to the lead |43 connected to the 1st contact bar of the selector 12. The leads |49|53 are connected, respectively, to the 1st to 5th contact bars for the selector 13 from the 1st to the 5th contacts of the 1st set of contacts for the selector 12. Moreover, the 1st contact of the 2nd set of contacts of the selector 12 is connected to the 2nd contact of the 1st set of contacts. The 1st and 2nd contacts of the 3rd and 2nd sets of contacts are connected with the 3rd contact of the 1st set of contacts. The-1st, 2nd and 3rd contacts of the 4th, 3rd and 2nd sets of contacts are connected with the 5th contact of the 1st set of contacts. The 1st, 2nd, 3rd and 4th contacts of the 5th, 4th, 3rd and 2nd sets of contacts 3rd, 4th and 5th contacts of the 5th, 4th and y 3rd sets of contacts are connected with the lead |55. The 4th and 5th contacts of the 5th and 4th sets of contacts are connected to the lead |55, and the 5th contact of the 5th set of contacts is connected to the lead |51. Leads iSd-|57 are connected to the leads |49|52 in numerical order over coils of the relay 22. Leads |58|62 are connected to the 1st to 5th contact bars respectively of the selector 14. Besides, the contact points of the selector 13 are connected in an analogous manner to the contact points of the selector 53. These are extended to the leads ||1-|2|, partly as coils of the relays 2 and 3, and in the same manner the contact points of the selector 13 are connected with the leads |53|62, partly over coils of the relays 23 and 24 corresponding to the relays 2 and 3. The contact points of theselector 14 are connected in a manner analogous to that described with reference to the selector 10, in that the leads IGS-|61 are extended, together with the leads |3|||34, as result leads out of Fig.' 5. These leads |63-I61 are, in a manner similar to that described with reference to the selector 10, connected to the contact points of the selector 14, partly over `coils of the relays Vv25-23 corresponding to the relays 1, 8, 4 and 5. Corresponding to the lead |35, the lead |88 is also extended out of Fig. 5 in the same set of leads which in Fig. 7 is extended to the contacts of the relays 63 and 64. The lead |68 is connected to the plus terminal by the battery of means of the working contact of the relay 2|. This relay comprises 5 different coils, all of which areconnected to the minus terminal of the battery and to 1st and 2nd additional contacts of the 2nd and 1st sets of contacts, to lst, 2nd, 3rd and 4th additional contacts of the 4th, 3rd, 2nd and 1st sets of contacts, to 2nd, 3rd, 4th, 5th and 6th additional contacts of the 5th to 1st sets of contacts, to

are analogous to those of relay h. in Fig. 2, per- 7 form, in addition to a movement of the appertaining rollers. also a contact closure of the working contacts y. The movable contact springs of these sets of contacts are all connected to the terminal of the battery by means of the .lead |69 over a resting contact of the relay 60 in Fig. 7. Over the working contacts in the set of contacts |10 pertaining to the 5th set of contacts of all selectors 6114, a circuit is closed to the relays |2|5, Fig. 4, and 33-36, Fig. 5, when the relays 8f|| and 29-32 keep the working contacts y closed and the appertaining selector rollers occupy the th step position. The same circuits which are thus closed from the plus terminal of the battery over a resting contact of the relay 60, the lead |69, the' working contacts y, lead |10' and the coils of the relays |2|5 and 83-36 are also connected to working contacts of these relays. The movable contact spring of the relays I2 and 33 corresponding to these working contacts is connected to the lead |10' which, in turn, is connected over a resting contact of the relay I8, Fig. 4, to the lead I 'II which is connected over a working contact of the relay 20, Fig. 4, to the plus terminal of the battery. The circuits which are closed over the coils I3, I4, I5 and 34, 35 and 36 are also extended over working contacts of the respective relays to the lead |12 which is connected over a resting contact of the relay I1 to the above mentioned lead |1I. The circuits of the relays I2|5 and 33-36 will therefore be closed later on by means of the circuit lead I1I, lead |10', and lead |12.

I'he lead III is connected over a resting contact of the relay I2 to the lead |13 which is connected to the uppermost contact spring of the relay 33, Fig. 5, and over a resting contact of the contact switch 15, Fig. 7, to the lead |14, to working contacts of the relays I3|5 and 34-36 and to the lead|15 over the coil of the relay I6, Fig. 4, to the minus terminal of the battery. The leads |1| and |13 are moreover connected to the lead |16 over working contacts of the relays I2 and 33, which are connected to minus over the coil on the relay I9, Fig. 4.

Over working contacts of the relay I6, the lead |1| is connected to the leads |11, |18 and |19 over working contacts of the relays I3, I4 and I5, see Figs. 4, 6, 7, and 5. The leads |11|19 are connected to the minus terminal of the battery over the coils of the selector actuating relays 29, 30 and 3|. Over Working contacts of the relay I9, the lead |1| is connected to the lead |80 and the lead |8| over working contacts of the relay I2. The leads |8| and |80 are connected to the minus terminal of the battery over the coils of the selector actuating relays 8 and I0. Moreover, the leads |82 and |83 are connected to the lead |1| over working contacts of the same relay I9. 'I'hese leads |82, |83 are connected over working contacts of the relay 38 to the leads |11 and |19 which extend onto the minus terminal of the battery over the coils of the relays 29 and 3|.. By reason of the circuits described, the plus terminal will be seen to be connected to the lead |1I over a working contact of the relay 20. Furthermore, the leads |85, |86 and |81 are connected over working contacts of the relay I6 to the lead |1|, which is connected over working contacts of the relays 34, 35 and 36 to the leads |88|90. These leads are extended out of Fig. 5 and permit of being connected to a further set of step selectors connected in a manner analogous to that of Fig. 5, if the capacity of the machine is desired to be made greater.

In sach a me, the switch 1s, Fig. v, is switched over, so that lead |13y is connected to lead |9| which in its turn will be connected to the uppermost contact of a relay corresponding to relay 33 in the next following set of step selectors below those of Fig. 5. lThe lead |05', therefore, is connected with lead |14 over a series of resting contacts of relays, one in each set of selectors. The lead |08' may be connected to the plus terminal oi the battery by -means of the push button |09,

Fig. 7, or it may be connected automatically to the said plus terminal over lead I 65, the X-contacts of the relays 8|| and 29-32, and an extra working contact 61a-14a `on the third step of the selectors 61-14 and further a working contact of the respective relays |2-I5 and 33-36 pertaining to said selectors.

The relays 8|| and 29-32 for moving the roll-` ers of the selectors may also be closed by means of the push button |08, Fig. 7, in that the plus terminal is connected by this push button to the lead |94 which is connected with the minus terminal of the battery over the coil of the relay 60. The circuit over the resting contact of this relay from the plus terminal of the battery to the lead |69 connected to the contacts y of the step selector relays will thus be opened. On the other hand, the plus terminal is closed over a working contact of this relay 60 to the lead |95, Fig. 5, which is connected over resting contacts ofthe irst set of contacts of the selectors 61-10 and 'II-14 to the leads ISS-203. Over other working contacts of the relay 60, the leads I 96-203 will be closed to the leads |8I, |93, |80, |92 and |11, |18, |19, and |84. The latter leads are connected to the minus terminal ofthe battery over the coils of the following relays stated in the same order: 8, 9, I0, II and 29, 30, 3|, and 32. 'I'he circuit over the said relays may be closed and opened by means of the push button |08, whereby the circuit over the relay 60 is closed and opened and the selector are rotated step by step. As soon as the selectors reach'vtheir initial position, the resting contacts connected to the leads |96- 203 Will be opened, whereby the said circuits to the selector relays are opened, and the selectors remain stationary in their initial positions.

By means of the push button |01,'Fig. 7, a circuit is closed from thewplus terminal of the battery over this push button and the coil of the relay 6| to the minus terminal of the battery. The leads |11, |18, |19 and |84 are then closed over working contacts of this relay 6| with the leads 204-201 respectively. Since the plus terminal is closed over a resting contact ofthe relay 20, Fig. 4, with the lead,208, circuits may be closed by means of the push buttons 85-93 corresponding to the values 10-90, over the leads 204-201 and over Working contacts of-the relay 6I to the leads |11, |18, |19 and |84 and to the minus terminal of the battery over the coil `for the selector actuating 'Y relays 29-32. Push button 85 thus connects the lead 208 to 204, push button 86 ,connects the lead 208 to the lead 205, push button 81 connects the lead 208 to 204 land 205, push button 88 connects the lead 208 to the lead 206, push button 89 connects the lead 208 to leads 204 and 206, push button 90 connects the lead 208 toleads 205 and 206, push button 9| connects lead 208 to leads 204, 205 and 206, push button 92 connects lead 208 to lead 201, rand push button 93 connects lead 208 to leads 204 and 201. Lead 208 is connected to leads 2092|2 over push buttons 16-84. These leads are connected over working contacts of relay u with leads m, m, no and m which.

are connected with the minus terminal of the battery over the coils ot the selector actuating relays 8-| By means of the said push buttons it will thus be possible to close circuits over` the coils ot the selector actuating relays as long as the circuit over the relay 6| is kept closed. By means of the push button |86 a circuit is closed directly over the relay 82. by which leads 284-281 and 2882|2 are closed directly to the relays 55, 54, 53, 52 and the relays 58, 58, 51 and 58. According as one or more of these circuits are kept closed by means of the push buttons 18-93, the plus terminal of the battery will be closed over working or resting contacts on these relays and switch to the leads for the selector actuating relays. The circuits thus lclosed correspond, as will be immediately seen from Fig. 7, to the complementary values corresponding to the push buttons 18-83.V 'I'he push buttons 15-84 correspond to the digits l-9 of the first order, i. e. units, and the push buttons 85-83 correspond to the same digits of the second order, Le., tens. The circuits which were thus closed by means of the push button 18 over working contacts of the relay 8| to the relays of the selectors are also closed over a working contact of the relay 62 to the relay 58. When the circuit over the coil on the relay 58 is closed, the plus terminal could be switched over the contact system of the relays 58-58 to the lead |8| and the lead |92, which are connected with the minus terminal of the battery over the selector actuating relays 8 and respectively. These circuits are also closed by the pushbutton 84 directly over the working contacts of the relay 8|. 'I'he push button 84 represents the complementary value corresponding to the push button 16. The push button 85 is shown to close a circuit over the relay 55. When this circuit is closed, the plus terminal could be switched to the lead |84`over the contact system pertaining to the relays 52-55. The same circuit over the lead |84 which is connected to the minus terminal of the battery over the coil on the selector actuating relay 32 is also closed by means of the push button 92. This is in agreement with the complementary value of the number which is 88.

By means of thepush buttons 94-I82, which correspond to the multiplier values 1-9, the lead 288 is connected to the leads 2|3-2I8, which are connected to the minus terminal of the battery ovex` the multiplication relays 4|-44, Fig. 6. By means of the same set of push buttons 94|82, the lead 288 is also connected to the lead 2|1 which extends over the coil of the relay 49 to the minus pole of the battery. By means of the push buttons 85-83, the lead 288 is also closed with the lead 2| 8, which is connected over a working contact of the relay 49 to the coil of the relay 5| through the lead 2|8. The push buttons 16-ufconnect1ead 20a to lead 22o,wh1ch is connected over a working contact oi the relay 49 tn the lead 22| which is connected to the minus terminal of the battery over the coil on the relay 58. By working contacts of the relay 58, thev leads 289-2i2 are connected to the leads 222-225. The leads 284-281 are connected over the working contacts of the relay 5| to the same leads 222-225. These leads are connected to the minus terminal of the battery over the coils of the relays 31-48, Fig. 6.

By means oi.' the push buttons 84-l82, circuits may be closed over the relays 4 I-44, and by means of the push buttons 18-83 it will also be possible to close circuits over the relays 31-48. According as one or more circuits are closed over the relays 31-44, the plus terminal of the battery may be closed over the sets of contacts pertaining to these relays and further to one or more of the leads 258-285. Thus the plus terminal may be connected with one or more of the leads 226-251, Fig. 6, over the contact system pertaining to the relays 31-48, which consists of 56 sets of contacts. Thus the plus terminal is connected with' the following leads, if a circuit is closed over the coil of the relay 31:

If a circuit ls closed over the relay 38, the plus terminal of the battery will be connected with the following leads:

If circuits are closed over the relays 31 and 38, ghe plus terminal is closed with the following eads: 25:28, 232, 236, 238, 242, 245, 241, 249, 252, 253,

The plus terminal of the battery is connected to the following leads when a circuit is closed over the relay 38:

For circuits closed over the relays 31 and 38 the plus terminal of the battery will be connected to the following leads:

For circuits closed over the coils 38 and 38 the plus terminal will be closed with the following leads:

For circuits closed over the coil of the relays 31 and 38 and 38 the plus terminal of the battery will be connected to the leads:

For a circuit over the coil `of the relay 48 the plus terminal will be closed with the following leads:

For circuits closed over the coils oi.' the relays 31 and 48 the plus terminal of the battery is connected to the following leads:

The leads 226-251 may be connected to one or more contact groups distributed over four con-y -258, 268, 28| and 262 will be connected to the leads 253, 241, 24| and 233, respectively.

If circuits are closed over the relays 4| and 42, the leads 258, 259, 288, 28|, 282 and 263 will be connected to the leads 252, 258, 258, 245, 23| and 234 respectively. l

If a circuit is closed over the relay 43, the leads 259, 268, 26|, 282, 283 will be connected to the leads 232, 248, 248, 232 and 233 respectively.

For circuits over the relays 4| and 43, the leads 258, 258, 268, 28|, 282, 263 and 284 will be conspectively.

nected to the leads 2.52, 233, 238, 236. 233, 236 and 236 respectively.

For circuits over the relays 42 and 43, the leads 259, 266, 26|, 262, 263 and 264 will be connected to the leads 254, 248, 242, 236, 23| and 234 re- For circuits over the relays 4|, 42 and 43, the

l leads 258, 259, 286, 28|, 282, 283, 284 will be connected to the leads 252, 281,2, 248, 286, 228

-and 229 respectively.

'For current over the relay 44, the leads 259, 266, 26|, 262, 263 and 264 will be connected to Vthe leads 231, 241, 243, 231, 232 and 233 respecof relay 45 and over the coils of the relays 8-I I.

The same leads 25826| are connected over working contacts of the relay 46 to the leads |11, |18, |19 and |84 for the relays 29-32. The leads 262-265 are connected to the same leads |11, |18, |19 and |84 over working contacts ofthe relay 41. The coils of the relays and 41 are connected to the lead 22| over a resting contact and a working contact of the relay'48 respectively.

The coil of this relay 48 is connected to the lead I22| over a working contact of the relay 56. The

lead 2|9 is connected to the minus terminal o6l the battery over the relay 5| as well as over the relay 46.

The relay 48 is in known manner made so as to be particularly slow-operating, so that the circuit of the relay 45 is not opened until the recording relays 8|| have had time to respond; In carrying out a multiplication one of the multiplier buttons 94|62 is pressed down, whereby the lead 268 being connected to the plus terminal of the battery over the resting contact 26' of the relay.26; Fig. 4, is connected to lead 2|1, so that the relay 49 is excited and the working contacts of the latter are closed connecting lead 226 with 22| and lead 2|8 with 2|9. When now one of lthe buttons 85-93 is pressed down, the relays 46 and 5| are energized over lead 2|9. By the same push buttons the plus terminal is also closed with one or more of the leads 264-261 which over working contacts of the relay 5| close circuits over the coils 31-46. At the same time the leads 25a-26| are closed over working contacts of the relay 46 onto the selector actuating relays 29-32. By one of the push buttons 16-84, the lead 268 is connected to the lead 226 so that, at rst, the

i* relays 56 and 45 are excited. The circuit for the relay 45 goes over a resting contact. of the relay 4 8. Over work-ing contacts of the relay 56. the leads 269-2I2 are closed with the leads 222- 225 leading to the coils 31-46. At the same time the plus terminal is closed over the leads 258-28I and over working contacts of the relay 45 for the selector actuating coils 8-| I. By a working contact of relay 56 the circuit is closedA for the sluggishly operating relay 48, so that a little while later the contact spring of the relay 48 changes over from its resting contact to its working contact and thereby the relay 41 willv be excited. Hereby the leads 262-265 are closed over working contacts of the relay 41 and over the coils 29-32. The unit values and the ten values will thus be. multiplied and accumulated each perse.

'rml leads' lao-m and Ist-m are connected to theplusv terminal over the sets oi' contacts! of the selectors. By means of the push button; |63 Fig. '7, a circuit is closed over therelay 63, whereby the said leads |3|, |32, |34, |36 and |84, |88, |81, |68 are connected to leads 264-261( and 269-2I2, respectively. The leads |33 and |63 are closed over the coils and 68. -By these coils the plus terminal is closed over working contacts with the leads 2|6 and 2|| and the leads 268 and 266. The said groups of leads, which may also be connected to the plus terminal by means ot the push buttons. may be switched over to other Y groups of leads by means of therelays 6| or 62 as well as by the relay 49, as already described. For example, if the relay 62 is operated, the complementary values of what is recorded in the contacts of the relay 64 to the leads |36-|34" and 216 and to the leads |63'|61 and 21|, re-

spectively. Over resting contacts of the relay 268, the said groups of leads |36|34 vfrom the selectors will be connected to the lleads 212-216,

while the said set of leads will be connected over the working contacts of the same relay to the leads 21T-28|. These leads are in Fig. 10 connected to magnets 282-29I. The leads from the other group of selectors are connected to the magnets 292-36l over the contacts on the relay 269. This connection is not shown in Fig. 16. Figs. 9 and 10 show a printing device whereinf the said magnets adjust 4two printing bars 362 and 363 by Ameans of the xed stops 364 on the o bars.

By means of the latter the bars may be` stopped in 16 different positions according to the position of the magnet, the armature arms 365 of which hold the bars when these are pressed forth by the helical springs 366. These springs are held under tension by the eccentric roller 361. This roller may be turned through an angle of 186 degrees by means of the handle 368. The bars will be moved forwards into the position shown in Fig. 9, provided they are not Y retained by the armature arm of a magnet. At the movement of the eccentric roller, the boss 369 strikes against the arm 3|6 of the hammer 'Y The selectors shown in Figs. 4 and 5 arev arbitrarily chosen to car'ry out five steps each, which suiiices for several kinds of practical routine work. For other purposes it would be necessary to supply the selectors with more steps or to transmit the value represented by the fifth step to other selectors. Upon nishing the fifth step; the selectors will again be in their initial or zero position and the value of this fth step, which for the selectors 61-16 are the values of 5, 10, 20 and 46, respectively, has to be transfer/red. In order to perform the transfer simultaneouslyl in as many selectors as possible for time saving purposes, each selector may energize, as soon as one cycle of steps is accomplished, a special relay, such as the relays |2 |5, Fig. 4, and 33-36, Fig. 5. Circuits are closed over these relays, over'line |69 when the I 10 contacts belonging to the fifth set of contacts of the selectors are closed, simultaneously as the respective selector-actuating magnets h are energized and the corresponding tacts are closed. After the fifth impulse. has been completed and the selectors have moved into their flrst or initial position, the last-mentioned relays will be kept energized by the holding circuits over resting contacts of relay I8 for the relays I2 and 33, and of relay |1 for the relays I3-I5 and 34-36. The relays which in this way are energized will, therefore, indidicate that the corresponding selector has `completed one cycle and the transfer can arbitrarily take place simultaneously from all the relays. The transfer takes place as soon as the line |05 is connected to the plus terminal of the battery. 'I'his can be done by pressing the button |05. The line I 05' will also be connected with the plus terminal of the battery automatically over the line |69 and the :c contacts of the selector-actuating magnets h when the selector contacts 61a-14a belonging to the third set of contacts of the selectors and the corresponding transfer relays |2-I5 and 33-36, are energized. Line I 05.' also closes a circuit overrelay 20. 'Ihe plus terminal over the battery is connected over a working contact of this relay with line |1I. Line I1I is directly connected with line |69 and also connected with the plus terminal over a resting contact of relay 60. The transfer circuits are closed over Working contacts of the relays I6 and I9. Over working contacts of relay I9 the line I1| is connected over working contacts of relay I2 with the lines I3| and |80 for energization of the selectoractuating magnets 8 and I0, transferring the value "iive in the -first denomination. The lines |82 and |83 from working contacts of relay |9 are connected with the lines |11 and |19 for energization of the selector-actuating magnets 29. and 3|, transferring the value flve" in the second denomination. Over Working contacts of relay I6 the line I1| is connected with lines |11, |18 and |19 over working contacts of relays I3, I4 and I5, respectively, closing circuits over the selector-actuating magnets 29,

30 and 3|. The values from the first denominational order representing the Values I0, 20 and 40 are thereby transferred to the next higher denominational order. The same values from the second denominational order could be transferred to a third denominational orderby closing line |1| by the lines |85, |86, and |81 which over working contacts of the relays 34-36 are connected with the line |88, |89 and |90 connected with the first, second, and third selector actuating magnet h for the next higher denominational order, if such one is to be added. The energization of the relays I6 and I9 takes place in the following manner. The line |05' is closed with the line |14 over resting contacts of relays I2 and 33 and lines |13 and |13. If another group of selectors for the next higher denomination order should be added, line |13 has to be switched over to line I9I by the switch 15, Fig. 7,- and then be connected with line I 14 over a resting contact of the transfer relay corresponding to the value five in that group of selectors, and so on. Line |14 closes circuits y C011- v over relay I8 by line |16, if any of the transfer relays I3|5 and 34-35 are energized. By relay I6 a circuit closes from line |1I over relay I1,\whereby the holding circuit for the lastmentioned relay is interrupted. 'I'hereby the relays will be de-energized and the selectors concerned advance one step. If any of the relays corresponding to the value live, such as I2 and 33, is energized, the line |05' will be switched over to line |16 closing a circuit over relay I9, thereby closing the circuits for transferring the value five, as described. Simultaneously, a circuit is closed by relay I9 over the line |1I' energizing the relay I8, whereby the holding circuit for the transfer relays corresponding to the value vesuch as relays I2 and 33, is interrupted, and the relays will be deenergized as well as the transfer circuits described, whereby the selectors concerned advance one step.

Numerical examples 'bined calculating operation which may be performed within the scope of the capacity of the machine herein described.

Multiplication is carried out by-partial products. Thus the following operation l concerns the partial product 4x 10 and operation 2 concerns the partial product 4X3. Thereafter the value 37 is added in operation 3, and in operation 4 the value 17 is subtracted. Operation 5 concerns the taking of the total of the example in question.

Operation 1.-'I'he push button 97 representing the multiplier is depressed and latched down and thereafter or simultaneously the button 85 representing the multiplicand l is depressed, the following circuits being then closed: plus terminal over. resting contact of the relay 20 and lead 208. Lead 208 is connected by the push buttons to leads 2| 1 and 2|5 and leads 2|8 and 204. Lead 2|1 closes the circuit over the coil 49 closing 22B-22| and 2|8-2I9, and lead 2|5 closes the circuit over the coil 43. Lead 2|9 closes the circuit over the coils 46 and 5I to the minus terminal of the battery. Lead 204 is closed over a lworking contact of the relay I to lead 222 which -is connected over the coil 31 with the minus terminal of the battery. Over the contact system of the relays 31-40, Fig. 6, the'following leads will be connected with the plus terminal of the battery: 243, 244, 248, 25|, 252, 253, 254,' 256, 251. Over the contact systern of the relays 4I-44, the leads 259, 260, 26|, 262 and 263 will be connected to the leads 232, 248, 240, 232 and 233, but only the lead 248 of all of said leads extends completely through to the plus terminal through contacts of relays 31-40.

The various connections are as follows, considering the relays 31 and 43 being energized, while the others are at rest: From the left-hand Working contact 60| of relay 31 over the horizontal lead 50|, second resting contact 603 of relay 38, lead 504, resting contact 604 of relay 39, lead 505, resting contact 605 of relay 40, lead 506 to horizontal lead 254; lead 504, resting contact 606 of relay 39, lead 501, resting contact 601 of relay 40, lead 508.to horizontal lead 256; lead 504, resting contact 6I| of relay 39, lead 509, resting contact 6I2 of relay 40, lead SII) to horizontal lead 244; lead 504, resting 15 contact 8| 3 o! relay 39, lead 5| I, resting contact 8|4 of relay 49,- lead 5|2 to horizontal line 25|; lead 69|, third resting .contact V6|5 of relay 38, lead 5|3, resting contact 698 of relay 39, lead 6|4a, resting contact 699 of relay 49, lead 5|5 to horizontal lead 24322, resting contact 6I9/of relay 49, lead 5I6 to horizontal lead 251; lead 5|3, resting contact 6|6 of relay 39, lead 5 I1, resting contact 6|1 of relay 49, lead 5|8 to horizontal line 248; lead 59|, resting contact 6|8 of relay 39, lead 5|9, resting contact 8| 9 of relay 49, lead 529' to Vhorizontal lead 253; lead 59|, vertical lead 593 to horizontal lead 252; from the right-hand working contact 692 of relay 3 1 over the horizontal lead 592 there is no connection to any of the horizontal leads 226-251. Line 259 at the bottom of Fig. 6 is connected over` resting contact 629 of relay di, lead 52|,'

resting contact 62| of relay 62, lead 522, working contact 622 of relay 43, lead 523 to horizontal lead 232; line 258 has no connection; line 269 over resting'contact 623 of relay 4|, lead 524, resting contact 624 of relay 62, lead 525, working contact 825 of relay 43, lead 526 to horizontal lead 248; line 26| over resting contact 626 of relay 4|, lead 521, resting contact 621 of relay 42, lead 528, Working contact 628 of relay 43, lead 529 to horizontal lead 249; line 262 over resting contact 639 of relay 4|, lead 539, resting contact v63| of relay 42, lead 53|, working contact 632 of'--relay 43, lead 532 to horizontal lead 232; line 263 over resting contact 633 of. relay 4|, lead 533, resting contact 634 of relay 42l lead 534, working contact 635 of relay 43, lead 535 to horizontal lead 233;

line 264 has no connection, as the Working con` tact 636 of relay 42 and the Working contact 631 of relay 44 are open; line 265 has no connection, as the working contact 638 of relay 4| is open.

Over a working contact of the relay 46, the lead 269 is connected to lead |19 which extends to the minus terminal of the battery over the coil of the selector'actuating relay 3|. This relay moves the roller 13 which is supposed to be in its initial position, a step onward in such a manner that the contact closures performed by this roller are moved from the 1st to the 2nd set of contacts when push button is released. The value 40, which is the result of the multiplication 4x10, has thus been accumulated since one step of the roller 13 corresponds to the value 40.

Operation 2.-Push button 18 representing the multiplicand value 3 is depressed, the button 91 still being latched down, and lead 298 is hereby connected to leads 229 and 299 and 2| 9. Lead 229, which is connected to lead 22|v over a working contact of relay 49, over the coil of which the circuit is still closed by the button 91, is connected to the minus terminal of the battery over the coil 59 and over coils 45 and 48, over a working contact of `the relay 59 and a resting contact of the relay 48. As stated, the relay 48 is retarded for a certain time before its armature responds. During this lapse of time leads 299 and 2|9 will be closed over working contacts of the relay 59 with leads 222 and 223 for the coils 31 and 38. The plus terminal is now closed over the contact system for the relays 31-43 with leads 259 and 262. Of these the lead259 is connected to the lead |93 over the relay 45. Lead |93 passes over the recording coil 9. 'Ihe contacts corresponding to the roller 68 will thus be closed as far as the second set of contacts are concerned. Hereby the numerical value 2 has been accumulated, inasmuch as each step of the roller 68 represents the number 2. Immediately after this relay has responded, the circuit is opened by the lead 22| being connected to the coil 81 over a working contact of the relay 48 instead of being connected to the coil 45. Over workingcontacts of the relay 41, the lead 262 is connected to the lead |11 over the coil pf the selector-actuating relay 29. Now, if, the\ push buttons 91 and 18 are released the circuiti over the selector-actuating relay 29 is opened, and the contacts pertaining to the roller 1I will be closed as far as the 2nd set of contacts are concerned. Hereby the numerical value l0 hasl been accumulated and this, with the accumulated value 2, comprises the value 12 which is the result of the multiplication 4X3 in this second operation. All push buttons are now in released positions.

Operation 3.-Push button |91 which effects the carrying out of an addition, push button 81 representing the value 30 to be added, and push button 82 representing the value '1 to be added are depressed either simultaneously or one after the other. By push button I 91. a circuit be closed over the coll of the relay 6|. Over working contacts of this relay, the leads 294.1and 295 and 299, 2|9 and 2|| will be closed, and these are connected to the leads |11, |18 and |8I, |93 and |89 by the relay 6|. Hereby, circuits are closed over the, selector-actuating relays 29, 39 and 8, 9, and I9. If the depressed push buttons are released, the rollers 1| andV leased position.

Operation 4.-Push button |96 which effects the carrying out of a subtraction operation, push button 85 representing the value l0 to be subtracted and push button 82 representing the value 7 to be subtracted are depressed. A circuit is closed over the vrelay 62 by button |96. Over working contacts of this relay, the lead 294 is closed over theA coil of the relay 55, and the leads 299, 2| 9 and 2I| are closed over the coils 59, 58 and 51 ontothe minus terminal of the battery. All leads are connected with the plus terminal of the battery over the lead 298. Over the contact system for the relays 52-55, the plus terminal is closed over the lead |84 for the selector actuating relay32. Over the contact system for the relays 56-59, the plus terminal is closed with the leads |8I and |93 over the coils for the selector actuating relays 8 and 9. Now, if the push buttons are released, the rollers 61, 68 and 14 are moved by one step. The sets of contacts pertaining to the respective rollers are now closed as follows: For roller 61 the 3rd contact set, for roller 68 the 4th contact set', for roller 69 the 2nd contact set, for roller 19 the 1st contact set, for roller.1| the 3rd contact set,`

for roller 12 the 2nd contact set, for rollers 13 and 14 the 2nd contact set also. 'I'he push buttons |96, 85 and 82 are now in released position.

Operation 5.Now, if for instance push button |94 is depressed. a circuit will be closed over the relay 64. Hereby the following circuits are closed over the contacts of the selectors: -plus terminal, 3rd set of contacts of the roller 81, lead connected to the 2nd contact bar of the selector 88, 4th contact set, lead ||8 connected to the 5th contact bar of the selector 69, 2nd contact set, which is connected by the lead |23 over a coil on relay 2 to lead ||8, which is closed over the 2nd contact bar and the 1st set o1' contacts of the selector to lead |3|, which is connected over working contacts of the relay 84 over a resting contact 'of the relay 288 to lead 213, which is connected to the minus terminal of the battery over the printing magnet 284.

Overy the contact system on the relays |-1,v

the plus terminal is connected to lead |31, which isr connected to the 2nd contact bar for the se-v lector 1|. Over the 3rd contact set of this selector, the 2nd contactbar is connected to the minus terminal of the battery over one of the coils of the relay 2|. Moreover, the lead |44 from the same set of contacts is connected to the lead |5| over the 2nd bar and 2nd set of the selector 12 and is connected further to the lead |62 over Vthe 3rd bar and 2nd set of selector 13 connected to the lead |66 over the 5th bar and 2nd set of selector 14 and over a coil of relay 28. By closing working contact of relay 2| lead |88 (21|) .passes over the coil'oi' relay 269, Fig. 10. Lead |66 (|66') passes over a working contact oi the same relay 269 over the coil of the printing magnet 299. -The leads from the resting and working contacts of the relay 289, which are not shown connected in Fig. 10, extend however to the magnets 292-30I, in the manner shown with reference to the resting and working contacts of the relay 268, which are connected to the magnets 282--29|. 'I'he lst set of magnets 282-29I correspond to the units of the decimal system, while the 2nd seil of magnets 292-30I correspond to the tens of thel decimal system.. The two magnets, over the coils of which circuits were closed, that is to say 284 and 299, will retain the bars 302 and 303 after a movement of two and seven digits respectively. Now, if as a 6th operation the eccentric roller 301 is turned clockwise', the bar 303 will be brought by its spring into printing position for the digit "I and the bar 302 into printing position for the digit 2. Consequently, the hammer 3I| will print the number 72 on the paper strip as a result of the calculating operations performed.

Ii instead of the push button |04 the push button |03 had been operated, whereby the plus terminal would be closed over the coil of the relay 63, the lead I3| would be connected to the lead 2|0, whereas the lead |66 would be connected to the minus terminal of the battery over the relay 66. Lead |68 is connected to the lead 204, while the plus terminal is connected over working contacts of the relay 66 to the leads 205 and 206. Since these leads correspond to the numerical values 2, 10, and 40, and 2 is the code value in the units order, while 10, 20 and 40 are the code values in the tens order, all four values together represent the result 72 which thus is expressed in the cbde 1-248.

The lines energized by relay 63 may be extended to additional registers, recording devices or card punching mechanism but, for simplicity of illustration and explanation, have been shown only as returned to the code value lines that are controlled by the numerical value push buttons 16-84 and 85-93, thus providing a check upon the accuracy of the operation of the mechanism.

The operation of key |04 at the close ot a comlays 322 and 324.

putation servesto print out the result by the mechanism shown in Figs. 9 and 10. If keys |03 and |06 are depressed simultaneously with the printing key |04, the result lines of relay 63 return the registered value to the machine but, due to the actuation of relay 62 by key |06, the complement of the registered value is set up in the accumulators.. This complement, when added to the registered value, should be zero and the operation may therefore be checked by again depressing the key |04 to print out the value registered in the accumulators. If the second printed value is not zero, the operator is advised that there has been some error in the operation of the mechanism.

In the example above discussed, the result determined by the mutual positions of the step selectorswas expressed by the l0-digit or decimal system. It could also, however, be simply expressed according to any other code eystem.

Fig. 1l shows a circuit diagram of the contacts of the step selectors, by means of which the result will be expressed, for instance, according to the duodecimal system. Fig. l2'shows a circuit diagram, by means of which the mutual position of the step selectors is expressed according to the numerical system having 20 as its basis.

The frames Y3|1-320, Fig. 1l, are diagrammatic representations of the rollers i of the step selectors shown in Fig. 2, and the rectangles 32|-324 designate the magnets h in Fig. 2 for advancing the rollers step by step. Since the mechanical transmissionmeans are disclosed in Fig. 2, all mechanical contrivances have been omitted in Fig. l1 for the'purpose of rendering the diagram clearer. The connections of the contacts of the step selectors which, by the way,

are analogous to the connections discussed with reference to Figs. 4 and 5, will immediately appear from the drawings. The leads 325-330 from the lst set of contacts of the selector 3|9 are connected to the six 'bars v of the selector 32u. Leads 325"329" are connected in numerical order to the same leads over coils of the relay 326. From the contacts of the 1st set of contacts of the selector 320, the leads 321-332 are extended out Aas result leads. are connected in numerical order to the same leads over coils of the relay 339. The leads 340- 345 are also connectedto the same result leads vin numerical order over coils of the relay 346.

The leads 341-350 are connected to the lead 35| over the contact system for the relays 326, 339 and 346. The lead 35| Ais connected directly to the plus terminal of the battery by means of a push button 352.

The push buttons 353-363 correspond to the numbers l-ll and close circuits over one or more of the selector actuating relays 32|- 324. Thus the circuit is closed over the relay 32| by the push button 353. By the push button 354 the circuit is closed over the relay 322. Push button 355 closes circuits over relays 32| and` 322. Push button 356 closes the circuit over relay 323.

,Push button 351 closes circuits over relays 32| and 323. Push button 358 closes the circuit over relays 322 and 323. Push button 359 closes the circuit over relays 32|, 322 and 323. Push button 360 closes the circuit over relay 324. Push button 36| closes the circuit over relays 32| and 324. Push button 382 closes the circuit overre- Push button 363 closes the circuit over relays 32|, 322 and 324. By means of these push buttons, the selectors 3|1-320 may The leads 333-338' be adjusted in dilerent positions relatively to each other.

The step selectors in Fig. 11 have four sets o1' contacts each. The capacity is selected arbitrarily so far and, moreover, no means are shown whereby the rollers may be brought into the initial position, nor any means whereby the 44: .'Ith'contactsnf the-2nd setl of lcontactsfas well as capacity can be increased beyond the number of contact sets at automatic transmissions to higher basic values, such as described with reference to the selectors 61-10 'in Fig. 4 and 1|-14 in Fig. 5, to which description reference is made here. On depression of the push button 352 the plus terminal is connected to lead 35| which is connected to the contact bar of the selector 3|1 as well as to the movable spring of the relay 326. The plus terminal of the battery will thus be connected both to one of the leads 321-332 over the contacts oi' the step selectors and to one of the leads 341-350 over the contact system for the relays 326, 339 and 346. These result leads may be connected to a printing device such as was described with reference to Fig. 10. In Fig. 11, the result Will appear as a table with the aid of signal lamps. Thus the leads 321-332 are extended onto the minus terminal of the battery over the lamps 364, 366, 363, 310, 312 and 314 over resting contacts of the relay 316. Thecircuit of therelay 316 is closed from the plus terminal of the battery over the push button 352 and a contact of the 2ndor 4th sets oi' contacts on the selector 3|1 in the lead 311 and onto the minus terminal of the battery over the coil of the relay 316. If this circuit is closed, the leads 321- 332 are closed over working contacts of this relay to the minus pole of the battery over the signal lamps 365, 361, 369, 31|, 313 and 315. 'I'he leads 341-350 extend over the contact switches 318-38I onto the lamps 332-385. By means of these contact switches the leads 341-350 may be switched over to the leads 386-389. These leadsare extended out of Fig. 11 and will reappear in Fig. 12 where they are seen as being connected to each one ci' the four contact. bars of the step selector 390.

Fig. 12 discloses the step selectors 390-393. 'I'he selector actuating relays 394-391 move the rollers of the `step selectors in the manner described with reference to Fig. 2. Circuits are `closed over the coils of the relays by means of the push buttons 398-401. The contacts of these push buttons are connected in a lmanner analogous to that described with reference tothe push buttons 353-362. The leads 4084|1 from .the contacts of the1st set oi contacts and the; 6th and vthe 6th contactar the' 3rd set of contacts of the selector 392 are! connected to the respective bars ofthe Aselector 3,93. v The 5th, .6th and 7th contacts of the 4th setaof vcontactsgas well as the 7th contact of the 3rd set of contacts, which are connected to the 5th contact of the previously mentioned set of contacts, are connected to the leads 408, 409 and 410 over coils of the relay 444, From the 1st to the k5th contact of the 1st set of contacts of the `'seleztor 393, the leads 4I8-422 are extended. out'asresult leads. The leads from 6thA to the th contact of the same set of contacts areextended onto the same result leads over coils of the relay 423.V -The 7th, 8th, 9th and 10th ,contacts of ,fthe 2nd set of contacts as well as the '7th contact/of the-3rd set of contacts are also connected to the samejleads over coils of the relay 424./ The 4th to8th contacts of the 4th set of contacts ofA the selector 393 extend to the same leads over coils of the relay 425, while leads from the 9th and 10th contacts of the 4th set of con` tacts are connected to the leads 4|8 and 4|9 over coils'of the relay 426. The leads 4 |8-422 are connet'ed to the minus terminal of the battery over resting contacts of the relay 421 through the signal lamps 428, 430, 432, 434 and 436. In the selector 390, a lead from the 2nd and 4th contacts of the 1st set of contacts and the 4th contact of the 3rd set of contacts are extended over coils of the relay 438, before they are connected to the respective contact bars of the selector 39|. YOn depression of the push button 439, the plus terminal oi the battery is connected to the 1st bar of the selector 390. Hereby the plus terminal of the battery will be connected to one of the leads 4l8422. Provided the circuit is closed over one of the coils of the relay 433, the plus terminal of the battery will be connected by means of the working contact of this relay to the lead 440 which is connected to the minus terminal of the battery over the coil of the relay 421. over 4|8-422 will then be closed over working contacts of the said relay onto the minus terminal of the battery through the signal lamps 429, 43|, 433, 435 and 431. At the same time, the plus terminal of the battery will be connected over the contact system for the relays 444, 423, 424, 425 and 426 to the minus terminal of the battery through the signal lamps 44|, 442 and 443.

Numerical examples In connection with Fig. 11, the calculating operation 3+9-l-11, for example, will be examined. The push buttons 355, 36| and 363 corresponding to the said numbers will be depressed in numerical order. The rollers, which are all assumed to be in the initial position, will be fed by steps through these operations, ina manner such that their mutual positions will `be the following after the impulses given from the push buttons to the selector actuating relays. Selector 3| 1 is advanced 3 steps, so that the 4th set of contacts is closed. Selector 3| 8 is advanced 2 steps, so that the 3rd set of contacts is closed, and this also holdsV true with respect to selector 320. By means of the push button 352, the following circuits are closed: plus terminal onto lead 35| which is connected to the contact bar of the selector 3| 1, which is connected over the 4th set of contacts tothe 2nd contact bar of the selector The circuits 3|3, which is connected over the 3rd set of contacts to the 4th bar of the selector 3|9, which is connected over the'lst set of contacts to the lead 'M328'. This leadv is connected to the 4th contact "barof the selector 320, which is connected to the #lead 338 connected to thelead 332 vover a coil of the relay 339. The bar of the selector 3|1 is in the 4th set of contacts also connected to the lead 311 which is closed onto the minus terminal of the battery over the coil of the relay 316. -The lead 332 is connected over a working contact of therelay 316 onto the minus terminal of the Ybattery through the signal lamp 315. By means of the push button 352, the plus terminal was connected to the lead 35|, which is Vconnected to the lead 348 over a resting contact of the relay 326, a Working contact of the relay 339 and a resting contact of the relay 346. 'I'he lead 343 is connected over a resting contact of the switch 319 onto the minus terminal of the battery through the signal lamp 383. .The signal lamp 315 indicates the number 11, and the signal lamp 383 indicates number 1 pertaining to the next higher order of the duodecimal system. 

